IT960559B - VOLTAGE CONTROL SAW-TOOTH OSCILLATOR WITH FREQUENCY INDEPENDENT RETURN TIME - Google Patents

VOLTAGE CONTROL SAW-TOOTH OSCILLATOR WITH FREQUENCY INDEPENDENT RETURN TIME

Info

Publication number
IT960559B
IT960559B IT7222/72A IT722272A IT960559B IT 960559 B IT960559 B IT 960559B IT 7222/72 A IT7222/72 A IT 7222/72A IT 722272 A IT722272 A IT 722272A IT 960559 B IT960559 B IT 960559B
Authority
IT
Italy
Prior art keywords
voltage control
return time
frequency independent
control saw
independent return
Prior art date
Application number
IT7222/72A
Other languages
Italian (it)
Original Assignee
Information Storage Systems
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Information Storage Systems filed Critical Information Storage Systems
Application granted granted Critical
Publication of IT960559B publication Critical patent/IT960559B/en

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/14—Digital recording or reproducing using self-clocking codes
    • G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels
    • G11B20/1407—Digital recording or reproducing using self-clocking codes characterised by the use of two levels code representation depending on a single bit, i.e. where a one is always represented by a first code symbol while a zero is always represented by a second code symbol
    • G11B20/1419—Digital recording or reproducing using self-clocking codes characterised by the use of two levels code representation depending on a single bit, i.e. where a one is always represented by a first code symbol while a zero is always represented by a second code symbol to or from biphase level coding, i.e. to or from codes where a one is coded as a transition from a high to a low level during the middle of a bit cell and a zero is encoded as a transition from a low to a high level during the middle of a bit cell or vice versa, e.g. split phase code, Manchester code conversion to or from biphase space or mark coding, i.e. to or from codes where there is a transition at the beginning of every bit cell and a one has no second transition and a zero has a second transition one half of a bit period later or vice versa, e.g. double frequency code, FM code
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K4/00—Generating pulses having essentially a finite slope or stepped portions
    • H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K4/00—Generating pulses having essentially a finite slope or stepped portions
    • H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
    • H03K4/08—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape
    • H03K4/48—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices
    • H03K4/50—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices in which a sawtooth voltage is produced across a capacitor
    • H03K4/501—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices in which a sawtooth voltage is produced across a capacitor the starting point of the flyback period being determined by the amplitude of the voltage across the capacitor, e.g. by a comparator
    • H03K4/502—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices in which a sawtooth voltage is produced across a capacitor the starting point of the flyback period being determined by the amplitude of the voltage across the capacitor, e.g. by a comparator the capacitor being charged from a constant-current source

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Signal Processing (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Details Of Television Scanning (AREA)
IT7222/72A 1971-04-12 1972-04-12 VOLTAGE CONTROL SAW-TOOTH OSCILLATOR WITH FREQUENCY INDEPENDENT RETURN TIME IT960559B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US13321971A 1971-04-12 1971-04-12

Publications (1)

Publication Number Publication Date
IT960559B true IT960559B (en) 1973-11-30

Family

ID=22457533

Family Applications (1)

Application Number Title Priority Date Filing Date
IT7222/72A IT960559B (en) 1971-04-12 1972-04-12 VOLTAGE CONTROL SAW-TOOTH OSCILLATOR WITH FREQUENCY INDEPENDENT RETURN TIME

Country Status (8)

Country Link
US (1) US3694772A (en)
JP (1) JPS5143934B1 (en)
CA (1) CA948718A (en)
DE (1) DE2210152C3 (en)
FR (1) FR2136315A5 (en)
GB (1) GB1389723A (en)
IT (1) IT960559B (en)
NL (1) NL174206C (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2249082C3 (en) * 1972-10-06 1980-11-27 Philips Patentverwaltung Gmbh, 2000 Hamburg Triangle voltage generator
JPS5532054B2 (en) * 1972-12-26 1980-08-22
JPS562437Y2 (en) * 1974-05-29 1981-01-20
DE2549827C2 (en) * 1975-11-04 1982-08-05 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Pulse width control
DE2712369C2 (en) * 1977-03-22 1981-09-24 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Oscillator for generating square-wave pulses
US4264879A (en) * 1978-12-18 1981-04-28 Ncr Corporation Interval timer circuit relaxation oscillator
DE2912492A1 (en) * 1979-03-29 1980-10-09 Siemens Ag MONOLITHICALLY INTEGRATED RECTANGLE IMPULSE GENERATOR
JPS56129423A (en) * 1980-03-14 1981-10-09 Sony Corp Triangle wave generating circuit
JPS5834618A (en) * 1981-08-21 1983-03-01 テクトロニクス・インコ−ポレイテツド Symmetrical control function generator
DE3329242A1 (en) * 1983-08-12 1985-02-21 Siemens AG, 1000 Berlin und 8000 München CIRCUIT ARRANGEMENT FOR CHECKING THE DISTANCE OF RECTANGLE SIGNALS
DE4003418A1 (en) * 1990-02-05 1991-08-08 Thomson Brandt Gmbh INTEGRATED FM DETECTOR
US5274338A (en) * 1990-02-05 1993-12-28 Deutsche Thomson-Brandt Gmbh Integrated FM detector including an oscillator having a capacitor and Schmitt trigger
US6781357B2 (en) * 2001-09-27 2004-08-24 Power Integrations, Inc. Method and apparatus for maintaining a constant load current with line voltage in a switch mode power supply

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3376518A (en) * 1964-05-13 1968-04-02 Radiation Instr Dev Lab Low frequency oscillator circuit
US3559098A (en) * 1968-10-10 1971-01-26 Electro Optical Ind Inc Wide frequency range voltage controlled transistor relaxation oscillator

Also Published As

Publication number Publication date
NL7204915A (en) 1972-10-16
NL174206C (en) 1984-05-01
DE2210152C3 (en) 1975-09-11
FR2136315A5 (en) 1972-12-22
US3694772A (en) 1972-09-26
GB1389723A (en) 1975-04-09
DE2210152B2 (en) 1975-01-09
DE2210152A1 (en) 1972-11-02
CA948718A (en) 1974-06-04
JPS5143934B1 (en) 1976-11-25
NL174206B (en) 1983-12-01

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